Constellation           Integrys Energy Services

Integrys Energy Services, Inc. has joined Constellation!

What does this mean to Integrys customers? No changes to service or contracts at this time. We will be merging our companies and processes to ensure seamless service and a postive customer experience. We will keep you informed of our integration progress.

Please continue to contact your current customer care and sales resources.

Read the Press Release (PDF)                  Learn More (PDF)

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Chicago, Illinois
Electric Aggregation Program from Integrys Energy

City of Chicago Electric Aggregation Program

Congratulations City of Chicago

The City of Chicago’s Electricity Aggregation Program has been underway for more than a year, saving Chicagoans millions as compared to what they would have paid ComEd. Additionally, all electricity sourced on behalf of the City’s program is from completely coal free resources.

As an eligible City of Chicago customer, you will be automatically enrolled in the program unless you opt-out by January 31, 2015. Once enrolled, you may leave at any time and you will never have to pay any fees associated with joining or leaving the program.

View Pricing, Terms and Conditions:

Select your class of service:  

View sample bill

If you do not want to participate in this program, you may opt-out by January 31, 2015. For additional questions please call 888-802-2885 or view the program FAQs.

*To view your respective Terms and Conditions, please choose the appropriate selections under "View Pricing."

Accessibility notice: For individuals who are deaf or hard of hearing, you can utilize the nationwide 711 dialing feature to contact Integrys Energy Services. A representative can be reached by anyone by dialing 711 from a telephone or TTY (teletypewriter). For more information about 711, see